Ichiou Soshu - Ichiou Soshu

Japanese: 一翁宗守 - いちおうそうしゅ

…This is the most representative teahouse of the Mushakoji Senke school. It is said to have been built in 1667 (Kanbun 7) when the first Ichio Munemori retired from his position as head tea master of the Takamatsu domain, and the name of the room includes the meaning of "taking a break from official duties." The current Kankyuan was rebuilt in 1926, but it is said to have retained the same style as when Ichio first established it. …

From the Mushakoji Senke School

…One of the schools of tea ceremony founded by Sen no Rikyu. The first head of the school was Ichio Soshu, the second son of Rikyu's grandson Sotan, and every generation has taken the name of Soshu. The school is also known by its other name, the tea house "Kankyuan" at Nishinotoin in Mushakoji, Kyoto, built by Ichio, along with Fushin'an of the Omotesenke school and Kon'an of the Urasenke school. …

*Some of the terminology explanations that mention "Ichio Munemori" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…武者小路千家を代表する茶室。初代一翁宗守が高松藩茶頭（ちやどう）を辞した1667年(寛文7)に造立したと伝えられ，席名は〈仕官を休む〉という意を含んでいる。現在の官休庵は1926年に再建されたものであるが，一翁が創立したときの形式がそのまま踏襲されていると伝えられている。…